:root{--text: #423d4c;--text-h: #0d0a17;--text-muted: #726a80;--bg: #ffffff;--bg-subtle: #f8f7fc;--bg-canvas: #f3f1f9;--border: #e7e4ef;--border-strong: #d9d5e6;--code-bg: #f5f3ec;--accent: #7c3aed;--accent-2: #a855f7;--accent-hover: #6d28d9;--accent-bg: rgba(124, 58, 237, .09);--accent-border: rgba(124, 58, 237, .45);--danger: #dc2626;--danger-bg: rgba(220, 38, 38, .08);--success: #16a34a;--success-bg: rgba(22, 163, 74, .1);--warning: #d97706;--warning-bg: rgba(217, 119, 6, .1);--info: #2563eb;--info-bg: rgba(37, 99, 235, .1);--module-speaking: #2a78d6;--module-speaking-bg: rgba(42, 120, 214, .1);--module-writing: #eb6834;--module-writing-bg: rgba(235, 104, 52, .1);--module-reading: #1baf7a;--module-reading-bg: rgba(27, 175, 122, .1);--module-listening: #eda100;--module-listening-bg: rgba(237, 161, 0, .1);--shadow-xs: 0 1px 2px rgba(30, 15, 60, .05);--shadow-sm: 0 1px 3px rgba(30, 15, 60, .07), 0 1px 2px rgba(30, 15, 60, .05);--shadow: 0 12px 28px -12px rgba(35, 15, 75, .18), 0 4px 10px -4px rgba(35, 15, 75, .1);--shadow-lg: 0 24px 48px -18px rgba(35, 15, 75, .28);--accent-glow: 0 4px 14px -4px rgba(124, 58, 237, .4);--radius-sm: 8px;--radius: 10px;--radius-lg: 14px;--radius-xl: 18px;--sidebar-bg: #16131f;--sidebar-bg-raised: #1e1a2b;--sidebar-border: #2a2438;--sidebar-text: #c7c1d6;--sidebar-text-muted: #7c7590;--sidebar-text-h: #ffffff;--sans: system-ui, "Segoe UI", Roboto, sans-serif;--mono: ui-monospace, "SF Mono", Consolas, monospace;font:15px/1.5 var(--sans);color-scheme:light dark;color:var(--text);background:var(--bg-canvas);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media(prefers-color-scheme:dark){:root{--text: #cbc7d4;--text-h: #f5f4f8;--text-muted: #948da3;--bg: #18171f;--bg-subtle: #1e1c27;--bg-canvas: #131118;--border: #2f2c3a;--border-strong: #3c3849;--code-bg: #201e29;--accent: #a78bfa;--accent-2: #c4b5fd;--accent-hover: #c4b5fd;--accent-bg: rgba(167, 139, 250, .14);--accent-border: rgba(167, 139, 250, .5);--danger: #f87171;--danger-bg: rgba(248, 113, 113, .12);--success: #4ade80;--success-bg: rgba(74, 222, 128, .12);--warning: #fbbf24;--warning-bg: rgba(251, 191, 36, .12);--info: #60a5fa;--info-bg: rgba(96, 165, 250, .14);--module-speaking: #3987e5;--module-speaking-bg: rgba(57, 135, 229, .16);--module-writing: #d95926;--module-writing-bg: rgba(217, 89, 38, .16);--module-reading: #199e70;--module-reading-bg: rgba(25, 158, 112, .16);--module-listening: #c98500;--module-listening-bg: rgba(201, 133, 0, .16);--shadow-xs: 0 1px 2px rgba(0, 0, 0, .3);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .35);--shadow: 0 16px 32px -14px rgba(0, 0, 0, .55), 0 4px 10px -4px rgba(0, 0, 0, .4);--shadow-lg: 0 28px 56px -20px rgba(0, 0, 0, .6);--accent-glow: 0 4px 16px -2px rgba(167, 139, 250, .35)}}*{box-sizing:border-box}body{margin:0;background:radial-gradient(1100px 520px at 100% -10%,var(--accent-bg),transparent 60%),var(--bg-canvas);min-height:100svh}h1,h2,h3{font-family:var(--sans);font-weight:650;letter-spacing:-.01em;color:var(--text-h);margin:0 0 4px}h1{font-size:25px}h2{font-size:17px}h3{font-size:14px}p{margin:0 0 8px;color:var(--text-muted)}a{color:var(--accent)}.shell{display:flex;min-height:100svh}.sidebar{width:244px;flex-shrink:0;background:var(--sidebar-bg);display:flex;flex-direction:column;padding:18px 14px;box-shadow:1px 0 #00000059}.brand{display:flex;align-items:center;gap:10px;padding:6px 8px 22px}.brand-badge{display:flex;align-items:center;justify-content:center;width:30px;height:30px;flex-shrink:0;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-weight:700;font-size:14px;box-shadow:var(--accent-glow)}.brand-badge-lg{width:46px;height:46px;border-radius:13px;font-size:19px}.brand-name{font-weight:700;font-size:15px;letter-spacing:-.01em;color:var(--sidebar-text-h)}.nav{display:flex;flex-direction:column;gap:1px;flex:1;overflow-y:auto}.nav-link{position:relative;display:flex;align-items:center;gap:10px;padding:8px 10px 8px 14px;border-radius:8px;color:var(--sidebar-text);text-decoration:none;font-size:13.5px;font-weight:500}.nav-link-icon{display:flex;align-items:center;justify-content:center;width:16px;height:16px;flex-shrink:0;opacity:.85}.nav-link-icon svg{width:16px;height:16px}.nav-group-toggle-label{display:flex;align-items:center;gap:10px}.nav-link:hover{background:var(--sidebar-bg-raised);color:var(--sidebar-text-h)}.nav-link.active{background:linear-gradient(135deg,var(--accent),var(--accent-hover));color:#fff;font-weight:650;box-shadow:var(--accent-glow)}.nav-group{margin-top:10px;padding-top:10px;border-top:1px solid var(--sidebar-border)}.nav-group-first{margin-top:0;padding-top:0;border-top:none}.nav-group-label{padding:4px 10px 6px 14px;font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--sidebar-text-muted)}.nav-sub{padding-left:14px;font-size:13px;font-weight:450;display:flex;align-items:center}.nav-sub-dot{display:inline-block;width:5px;height:5px;border-radius:50%;margin-right:9px;background:currentColor;opacity:0;flex-shrink:0}.nav-link.active .nav-sub-dot{opacity:1}.nav-group-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:8px 10px 8px 14px;border:none;background:none;border-radius:8px;color:var(--sidebar-text);font:inherit;font-size:13.5px;font-weight:600;cursor:pointer;text-align:left;transition:background-color .15s,color .15s}.nav-group-toggle:hover{background:var(--sidebar-bg-raised);color:var(--sidebar-text-h)}.nav-group-toggle.has-active{color:var(--sidebar-text-h)}.nav-group-chevron{width:13px;height:13px;flex-shrink:0;color:var(--sidebar-text-muted);transition:transform .15s ease}.nav-group-chevron.is-open{transform:rotate(90deg)}.nav-group-body{display:flex;flex-direction:column;gap:1px;overflow:hidden}.nav-badge{display:inline-flex;align-items:center;justify-content:center;min-width:17px;height:17px;padding:0 5px;border-radius:999px;background:var(--danger);color:#fff;font-size:10px;font-weight:700;flex-shrink:0}.content{flex:1;min-width:0;min-height:100svh;background:var(--bg-canvas)}.topbar{display:flex;align-items:center;gap:16px;padding:13px 36px;background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.breadcrumb{display:flex;align-items:center;gap:6px;font-size:13px;min-width:0;flex:1 1 auto}.topbar-search{display:flex;align-items:center;gap:8px;flex:0 1 380px;padding:7px 12px;border:1px solid var(--border);border-radius:999px;background:var(--bg-subtle);transition:border-color .15s,background .15s,box-shadow .15s}.topbar-search:focus-within{border-color:var(--accent-border);background:var(--bg);box-shadow:0 0 0 3px var(--accent-bg)}.topbar-search-icon{width:15px;height:15px;color:var(--text-muted);flex-shrink:0}form.topbar-search input[type=text]{flex:1;min-width:0;border:none;padding:0;background:none;font:inherit;font-size:13.5px;color:var(--text-h)}form.topbar-search input[type=text]:focus{outline:none;box-shadow:none}.breadcrumb-crumb{color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.breadcrumb-crumb.current{color:var(--text-h);font-weight:650}.breadcrumb-sep{color:var(--border-strong);flex-shrink:0}.topbar-account{position:relative;flex-shrink:0}.topbar-avatar-btn{display:flex;align-items:center;gap:8px;padding:5px 10px 5px 5px;border-radius:999px;border:1px solid var(--border);background:var(--bg);cursor:pointer;transition:border-color .15s,background .15s}.topbar-avatar-btn:hover{border-color:var(--accent-border);background:var(--accent-bg)}.topbar-avatar{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-weight:700;font-size:12px}.topbar-email{font-size:13px;font-weight:550;color:var(--text-h);max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-chevron{width:14px;height:14px;color:var(--text-muted);flex-shrink:0;transition:transform .15s}.topbar-chevron.is-open{transform:rotate(180deg)}.topbar-dropdown{position:absolute;right:0;top:calc(100% + 8px);width:230px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden;z-index:30}.topbar-dropdown-header{display:flex;align-items:center;gap:10px;padding:12px 14px}.topbar-dropdown-email{font-size:13px;font-weight:650;color:var(--text-h);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar-dropdown-role{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.03em;color:var(--accent)}.topbar-dropdown-divider{border-top:1px solid var(--border)}.topbar-dropdown-item{display:flex;align-items:center;width:100%;padding:10px 14px;font-size:13px;font-weight:550;background:none;border:none;text-align:left;cursor:pointer;color:var(--danger)}.topbar-dropdown-item:hover{background:var(--danger-bg)}.topbar-icon-btn{position:relative;display:flex;align-items:center;justify-content:center;width:34px;height:34px;flex-shrink:0;border-radius:999px;border:1px solid var(--border);background:var(--bg);color:var(--text-muted);cursor:pointer;transition:border-color .15s,background-color .15s,color .15s}.topbar-icon-btn:hover{border-color:var(--accent-border);background:var(--accent-bg);color:var(--accent)}.topbar-icon-btn svg{width:17px;height:17px}.topbar-bell-badge{position:absolute;top:2px;right:2px;min-width:15px;height:15px;padding:0 4px;display:flex;align-items:center;justify-content:center;border-radius:999px;border:2px solid var(--bg);background:var(--danger);color:#fff;font-size:9.5px;font-weight:700}.notif-dropdown{position:absolute;right:0;top:calc(100% + 8px);width:320px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden;z-index:30}.notif-dropdown-header{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--border);font-size:13px;font-weight:650;color:var(--text-h)}.notif-list{max-height:320px;overflow-y:auto}.notif-item{display:block;padding:10px 14px;border-bottom:1px solid var(--border);text-decoration:none;transition:background-color .15s ease}.notif-item:last-child{border-bottom:none}.notif-item:hover{background:var(--bg-subtle)}.notif-item-text{font-size:12.5px;color:var(--text-h);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.notif-item-date{margin-top:3px;font-size:11px;color:var(--text-muted)}.notif-empty{padding:22px 14px;text-align:center;font-size:12.5px;color:var(--text-muted)}.notif-dropdown-footer{padding:9px 14px;text-align:center;border-top:1px solid var(--border)}.notif-dropdown-footer a{font-size:12.5px;font-weight:600}.page-body{padding:28px 36px 60px}.page{max-width:1140px;margin-inline:auto}.page-header{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.page-header h1{font-size:23px}.page-description{max-width:640px}.page-loading{padding:24px 0;color:var(--text-muted)}.empty-state{padding:48px;text-align:center;color:var(--text-muted);background:var(--bg);border:1px dashed var(--border-strong);border-radius:var(--radius-lg)}.empty-cell{color:var(--text-muted);text-align:center;padding:22px!important;font-size:13.5px}.login-page{min-height:100svh;display:flex;align-items:center;justify-content:center;background:var(--bg-canvas);padding:20px}.login-shell{display:flex;width:100%;max-width:980px;min-height:620px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);overflow:hidden}.login-side{position:relative;flex:0 0 44%;display:flex;flex-direction:column;padding:40px 36px;overflow:hidden;background:linear-gradient(160deg,var(--accent-bg) 0%,var(--bg-canvas) 65%,var(--bg) 100%)}.login-side-dots{position:absolute;top:0;right:0;bottom:0;left:0;background-image:radial-gradient(var(--accent-border) 1px,transparent 1px);background-size:18px 18px;-webkit-mask-image:linear-gradient(to bottom right,black,transparent 60%);mask-image:linear-gradient(to bottom right,black,transparent 60%);opacity:.5}.login-side-glow{position:absolute;top:-70px;right:-70px;width:220px;height:220px;border-radius:50%;background:var(--accent-2);opacity:.18;filter:blur(50px)}.login-side-content{position:relative;display:flex;flex:1;flex-direction:column}.login-side-brand{display:flex;align-items:center;gap:10px}.login-side-brand-name{font-weight:700;font-size:17px;color:var(--text-h)}.login-side-title{margin:22px 0 4px;font-size:34px;font-weight:800;letter-spacing:-.02em;color:var(--text-h);text-align:left}.login-side-title span{color:var(--accent)}.login-side-subtitle{margin:0 0 26px;font-size:14px;color:var(--text-muted)}.login-feature-list{display:flex;flex-direction:column;gap:16px}.login-feature{display:flex;align-items:flex-start;gap:12px}.login-feature-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;flex-shrink:0;border-radius:var(--radius);background:var(--bg);color:var(--accent);box-shadow:var(--shadow-xs)}.login-feature-icon svg{width:18px;height:18px}.login-feature-title{margin:0;font-size:13.5px;font-weight:700;color:var(--text-h)}.login-feature-desc{margin:2px 0 0;font-size:12.5px;color:var(--text-muted);line-height:1.4}.login-illustration{position:relative;margin-top:auto;padding-top:32px}.login-laptop{position:relative;margin-left:22px}.login-laptop-screen{border:6px solid var(--text-h);border-bottom:none;border-radius:10px 10px 0 0;overflow:hidden;background:var(--bg)}.login-laptop-base{height:10px;background:var(--text-muted);border-radius:0 0 6px 6px;opacity:.6}.login-laptop-sidebar{display:flex;flex-direction:column;gap:6px;width:34px;flex-shrink:0;background:var(--text-h);padding:8px 6px}.login-laptop-sidebar span{display:block;height:5px;border-radius:3px;background:#ffffff29}.login-laptop-sidebar span:first-child{background:var(--accent-2)}.login-laptop-stat{border-radius:6px;background:var(--bg-subtle);padding:4px 5px}.login-laptop-stat b{display:block;font-size:10px;color:var(--text-h)}.login-laptop-stat small{font-size:7px;color:var(--success)}.login-laptop-badge{position:absolute;right:-14px;bottom:18px;display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:var(--accent-glow)}.login-laptop-badge svg{width:20px;height:20px}.login-plant{position:absolute;left:-20px;bottom:-6px;width:60px;opacity:.9}.login-form-panel{flex:1;display:flex;align-items:center;justify-content:center;padding:40px 32px}.login-card{width:100%;max-width:360px;display:flex;flex-direction:column;gap:14px;text-align:center}.login-icon-badge{align-self:center;display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:var(--accent-glow);margin-bottom:4px}.login-icon-badge svg{width:26px;height:26px}.login-card h1{text-align:center}.login-card .field{text-align:left}.login-card .subtitle{margin-top:-8px;margin-bottom:4px}.login-row{display:flex;align-items:center;justify-content:space-between;font-size:13px}.login-remember{display:flex;align-items:center;gap:7px;color:var(--text-muted);cursor:pointer}.login-remember input{accent-color:var(--accent);width:15px;height:15px}.login-link-btn{background:none;border:none;padding:0;font-size:13px;font-weight:600;color:var(--accent);cursor:pointer}.login-link-btn:hover{color:var(--accent-hover)}.login-help{margin:4px 0 0;font-size:13px;color:var(--text-muted)}.login-help .login-link-btn{font-size:13px}.field-input-icon{position:relative;width:100%}.field-input-icon input{width:100%;box-sizing:border-box}.field-input-icon>svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--text-muted);pointer-events:none}.login-card .field-input-icon input[type=email],.login-card .field-input-icon input[type=password],.login-card .field-input-icon input[type=text]{padding-left:34px}.field-input-icon .password-toggle{position:absolute;right:10px;top:50%;transform:translateY(-50%);display:flex;align-items:center;background:none;border:none;padding:2px;cursor:pointer;color:var(--text-muted)}.field-input-icon .password-toggle svg{width:16px;height:16px}.field-input-icon .password-toggle:hover{color:var(--accent)}.login-card .field-input-icon input[type=password],.login-card .field-input-icon input[type=text]{padding-right:34px}@media(max-width:860px){.login-side{display:none}}.form{display:flex;flex-direction:column;gap:16px}.field{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--text-h);font-weight:550;margin-bottom:14px}.field-inline{flex-direction:row;align-items:center;gap:8px}.field-checkbox{flex-direction:row;align-items:center;gap:7px}.field-checkbox input{width:15px;height:15px}.field input[type=text],.field input[type=email],.field input[type=password],.field input[type=number],.field input[type=date],.field select,.field textarea,input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],select{font:inherit;padding:9px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--bg);color:var(--text-h);transition:border-color .15s ease,box-shadow .15s ease}.field input:hover,.field select:hover,.field textarea:hover,input:hover,select:hover{border-color:var(--accent-border)}.field input:focus,.field select:focus,.field textarea:focus,input:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.field textarea.mono,textarea.mono{font-family:var(--mono);font-size:12.5px}.input-with-action{position:relative;display:flex}.input-with-action input[type=text]{flex:1;padding-right:92px}.input-action-leading input[type=text]{padding-right:12px;padding-left:84px}.input-action-btn{position:absolute;right:5px;top:50%;transform:translateY(-50%);display:inline-flex;align-items:center;justify-content:center;min-width:68px;padding:6px 12px;font:inherit;font-size:12px;font-weight:600;border-radius:calc(var(--radius-sm) - 2px);border:1px solid var(--border-strong);background:var(--bg-subtle);color:var(--text-h);cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.input-action-leading .input-action-btn{right:auto;left:5px}.input-action-btn:hover:not(:disabled){border-color:var(--accent-border);background:var(--accent-bg)}.input-action-btn:disabled{opacity:.65;cursor:not-allowed}.hint-error{color:var(--danger)}.hint-loading{display:inline-flex;align-items:center;gap:6px;color:var(--text-muted)}.audio-preview{width:100%;height:34px;margin-top:2px}.audio-dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;margin-top:4px;padding:22px 16px;border:1.5px dashed var(--border-strong);border-radius:var(--radius);background:var(--bg-subtle);cursor:pointer;text-align:center;transition:border-color .15s ease,background-color .15s ease}.audio-dropzone:hover,.audio-dropzone:focus-within{border-color:var(--accent-border);background:var(--accent-bg)}.audio-dropzone.is-dragging{border-color:var(--accent);background:var(--accent-bg)}.audio-dropzone-icon{display:flex;color:var(--accent)}.audio-dropzone-text{font-size:13.5px;font-weight:550;color:var(--text-h)}.audio-dropzone-text strong{color:var(--accent);font-weight:700}.audio-dropzone-hint{font-size:11.5px;color:var(--text-muted)}.audio-file-card{display:flex;align-items:center;gap:12px;margin-top:4px;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-subtle)}.audio-file-icon{display:flex;align-items:center;justify-content:center;width:34px;height:34px;flex-shrink:0;border-radius:var(--radius-sm);background:var(--accent-bg);color:var(--accent)}.audio-file-meta{display:flex;flex-direction:column;min-width:0;flex:1;gap:1px}.audio-file-name{font-size:13px;font-weight:600;color:var(--text-h);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.audio-file-size{font-size:11.5px;color:var(--text-muted)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:0 18px}.form-actions{display:flex;align-items:center;gap:10px;margin-top:2px}.btn{font:inherit;font-weight:550;font-size:13.5px;padding:9px 16px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--bg);color:var(--text-h);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:border-color .15s ease,background-color .15s ease,color .15s ease,transform .08s ease,opacity .15s ease,box-shadow .15s ease}.btn svg{width:13px;height:13px;flex-shrink:0}.btn:hover{border-color:var(--accent-border);box-shadow:var(--shadow-xs)}.btn:active:not(:disabled){transform:scale(.96)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(180deg,var(--accent),var(--accent-hover));border-color:transparent;color:#fff;box-shadow:var(--accent-glow)}.btn-primary:hover{filter:brightness(1.06);box-shadow:0 6px 18px -4px #7c3aed80}.btn-ghost{background:transparent;border-color:transparent}.btn-ghost:hover{background:var(--bg-subtle);border-color:var(--border)}.btn-danger{background:transparent;color:var(--danger);border-color:var(--danger-bg)}.btn-danger:hover{background:var(--danger-bg);border-color:var(--danger)}.btn-accent{background:transparent;color:var(--accent);border-color:var(--accent-border)}.btn-accent:hover{background:var(--accent-bg);border-color:var(--accent)}.btn-info{background:transparent;color:var(--info);border-color:var(--info-bg)}.btn-info:hover{background:var(--info-bg);border-color:var(--info)}.btn-sm{padding:5px 11px;font-size:12.5px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;padding:0;flex-shrink:0;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--bg);color:var(--text-muted);cursor:pointer;transition:border-color .15s ease,background-color .15s ease,color .15s ease,transform .08s ease}.icon-btn svg{width:14px;height:14px}.icon-btn:hover:not(:disabled){border-color:var(--accent-border);background:var(--accent-bg);color:var(--accent)}.icon-btn:active:not(:disabled){transform:scale(.94)}.icon-btn:disabled{opacity:.45;cursor:not-allowed}.icon-btn-danger{color:var(--danger);border-color:var(--danger-bg)}.icon-btn-danger:hover:not(:disabled){background:var(--danger-bg);border-color:var(--danger);color:var(--danger)}.tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:1px solid var(--border)}.tab{padding:9px 4px;margin-bottom:-1px;border:none;border-bottom:2px solid transparent;background:none;color:var(--text-muted);font:inherit;font-size:13.5px;font-weight:600;cursor:pointer;transition:color .15s ease,border-color .15s ease}.tab+.tab{margin-left:18px}.tab:hover{color:var(--text-h)}.tab.is-active{color:var(--accent);border-bottom-color:var(--accent)}.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}.filters .search-input{min-width:240px;flex:1 1 240px}.search-form{display:flex;gap:8px}.table-wrap{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);overflow-x:auto;box-shadow:var(--shadow-sm);position:relative;transition:opacity .15s ease}.table-wrap .table{min-width:640px}.table{width:100%;border-collapse:collapse;font-size:13.5px;font-variant-numeric:tabular-nums}.table th,.table td{text-align:left;padding:14px 16px;vertical-align:middle}.table thead th{color:var(--text-muted);font-weight:650;font-size:11px;text-transform:uppercase;letter-spacing:.05em;background:var(--bg-subtle);border-bottom:1.5px solid var(--border-strong);white-space:nowrap}.table thead th:first-child{border-top-left-radius:var(--radius-lg)}.table thead th:last-child{border-top-right-radius:var(--radius-lg)}.table tbody td{border-bottom:1px solid var(--border);color:var(--text)}.table tbody tr:last-child td{border-bottom:none}.table tbody td:first-child{font-weight:550;color:var(--text-h)}.table-compact th,.table-compact td{padding:8px 12px;font-size:12px}.truncate{max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.row-actions{display:flex;gap:8px;white-space:nowrap}.chip{display:inline-flex;align-items:center;padding:3px 9px;border-radius:999px;border:1px solid var(--border);background:var(--bg-subtle);color:var(--text-muted);font-size:11.5px;font-weight:550;font-variant-numeric:normal;white-space:nowrap}.pagination{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:16px;font-size:13px;color:var(--text-muted);transition:opacity .15s ease}.pagination.is-loading{opacity:.6}.pagination-summary{display:flex;align-items:center;gap:6px}.pagination-pages{display:flex;align-items:center;gap:4px}.pagination-arrow,.pagination-page{display:flex;align-items:center;justify-content:center;min-width:32px;height:32px;padding:0 4px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font:inherit;font-size:13px;font-weight:550;font-variant-numeric:tabular-nums;cursor:pointer;transition:border-color .15s ease,background-color .15s ease,color .15s ease}.pagination-arrow svg{width:15px;height:15px}.pagination-arrow:hover:not(:disabled),.pagination-page:hover:not(:disabled):not(.is-active){border-color:var(--accent-border);background:var(--accent-bg);color:var(--accent)}.pagination-arrow:disabled,.pagination-page:disabled{opacity:.4;cursor:not-allowed}.pagination-page.is-active{background:linear-gradient(180deg,var(--accent),var(--accent-hover));border-color:transparent;color:#fff;box-shadow:var(--accent-glow)}.pagination-ellipsis{display:flex;align-items:center;justify-content:center;min-width:20px;color:var(--text-muted)}.badge{display:inline-block;padding:3px 9px;border-radius:999px;font-size:11.5px;font-weight:600;background:var(--border);color:var(--text);text-transform:capitalize;transition:background-color .2s ease,color .2s ease}.badge-published,.badge-approved{background:var(--success-bg);color:var(--success)}.badge-pending,.badge-pending_review,.badge-draft{background:var(--warning-bg);color:var(--warning)}.badge-rejected,.badge-archived{background:var(--danger-bg);color:var(--danger)}.badge-dup{background:var(--accent-bg);color:var(--accent)}.badge-easy{background:var(--success-bg);color:var(--success)}.badge-medium{background:var(--warning-bg);color:var(--warning)}.badge-hard{background:var(--danger-bg);color:var(--danger)}.badge-module-speaking{background:var(--module-speaking-bg);color:var(--module-speaking)}.badge-module-writing{background:var(--module-writing-bg);color:var(--module-writing)}.badge-module-reading{background:var(--module-reading-bg);color:var(--module-reading)}.badge-module-listening{background:var(--module-listening-bg);color:var(--module-listening)}.score-good{color:var(--success);font-weight:650}.score-warn{color:var(--warning);font-weight:650}.score-bad{color:var(--danger);font-weight:650}.badge-role-student{background:var(--info-bg);color:var(--info)}.badge-role-moderator{background:var(--warning-bg);color:var(--warning)}.badge-role-admin{background:var(--accent-bg);color:var(--accent)}.users-search-form{flex:0 1 320px}.user-cell{display:flex;align-items:center;gap:10px}.stats-page-avatar{width:44px;height:44px;font-size:16px;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:var(--accent-glow)}.user-avatar{display:flex;align-items:center;justify-content:center;width:30px;height:30px;flex-shrink:0;border-radius:50%;color:#fff;font-size:11.5px;font-weight:700}.pagination-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:16px}.pagination-bar .field-inline{margin-bottom:0}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;padding:24px;background:#0a081480;z-index:50;animation:fade-in .15s ease both}.modal-panel{width:100%;max-width:440px;max-height:calc(100vh - 48px);overflow-y:auto;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.modal-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;border-bottom:1px solid var(--border)}.modal-header h2{margin:0;font-size:16px}.modal-close-btn{display:flex;align-items:center;justify-content:center;width:28px;height:28px;flex-shrink:0;border:none;border-radius:999px;background:none;color:var(--text-muted);font-size:18px;line-height:1;cursor:pointer;transition:background-color .15s ease}.modal-close-btn:hover{background:var(--bg-subtle);color:var(--text-h)}.modal-body{padding:20px}.error-banner{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger);border-radius:var(--radius-sm);padding:11px 14px;font-size:13px;font-weight:500;margin-bottom:16px;animation:fade-in .15s ease both}.report-list{display:flex;flex-direction:column;gap:10px}.report-card{border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;background:var(--bg);box-shadow:var(--shadow-sm);transition:opacity .2s ease,background-color .2s ease,box-shadow .15s ease}.report-card:hover{box-shadow:var(--shadow)}.report-card.is-busy{opacity:.7}.report-summary{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 16px;cursor:pointer;background:var(--bg-subtle);transition:background-color .15s ease}.report-summary-main{display:flex;align-items:center;gap:10px;min-width:0}.report-snippet{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.report-date{font-size:12px;color:var(--text-muted);flex-shrink:0;display:flex;align-items:center;gap:6px}.report-detail{padding:16px;border-top:1px solid var(--border)}.report-raw-text{white-space:pre-wrap;background:var(--code-bg);border-radius:var(--radius-sm);padding:12px 14px;color:var(--text-h);font-size:13px}.report-meta{display:flex;gap:16px;font-size:12px;color:var(--text-muted);margin:10px 0 14px;flex-wrap:wrap}.report-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.card{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg);padding:18px;margin-bottom:16px;box-shadow:var(--shadow-sm)}.form .card{background:var(--bg-subtle);box-shadow:none}.form-section{padding:22px 24px;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg);box-shadow:var(--shadow-sm)}.form-section-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--accent)}.section-header{display:flex;align-items:center;gap:10px;margin-bottom:18px}.section-icon{display:flex;align-items:center;justify-content:center;width:26px;height:26px;flex-shrink:0;border-radius:8px;background:var(--accent-bg);color:var(--accent)}.section-icon svg{width:14px;height:14px}.callout{display:flex;gap:9px;padding:10px 13px;border-radius:var(--radius);background:var(--accent-bg);margin-top:4px}.callout-icon{display:flex;align-items:flex-start;padding-top:1px;color:var(--accent);flex-shrink:0}.callout-icon svg{width:15px;height:15px}.callout-text{font-size:12.5px;line-height:1.5;color:var(--text)}.char-count{font-size:11px;font-weight:600;color:var(--text-muted);flex-shrink:0;font-variant-numeric:tabular-nums}.char-count.is-near-limit{color:var(--warning)}.calibration-card{max-width:480px}.calibration-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.kv-list{display:grid;grid-template-columns:auto 1fr;gap:7px 16px;margin:0}.kv-list dt{color:var(--text-muted);font-size:13px}.kv-list dd{margin:0;font-size:13px;font-weight:500;color:var(--text-h)}.kv-icon{width:13px;height:13px;margin-right:6px;vertical-align:-2px;color:var(--text-muted)}.stats-profile-grid{grid-template-columns:auto 1fr auto 1fr;gap:12px 20px}.stats-top-grid{display:grid;grid-template-columns:1.1fr 1.4fr;gap:16px;margin-bottom:16px}.stats-summary-card{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.stats-summary-tile{display:flex;flex-direction:column;align-items:center;gap:6px;padding:8px 4px;text-align:center}.stats-summary-label{font-size:11.5px;font-weight:650;color:var(--text-muted)}.stats-summary-value{font-size:28px;font-weight:700;color:var(--text-h);letter-spacing:-.02em}.stats-summary-caption{font-size:11.5px;color:var(--text-muted)}.progress-ring-label{font-size:19px;font-weight:700;fill:var(--text-h)}.stats-mid-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}.stats-mid-grid>.card{min-width:0}.section-title{margin:0 0 12px}.stats-skill-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.stats-skill-grid>.card{min-width:0}.skill-card-header{display:flex;align-items:center;gap:10px;margin-bottom:4px}.skill-card-header h3{margin:0;text-transform:capitalize}.skill-card-list{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-direction:column;gap:12px}.skill-card-row-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:6px}.skill-card-row-meta{flex-shrink:0;font-size:12px;color:var(--text-muted);font-variant-numeric:tabular-nums}.skill-card-track{display:block;height:6px;border-radius:999px;background:var(--bg-subtle);overflow:hidden}.skill-card-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .4s ease}.weak-area-list{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.weak-area-list li{display:flex;align-items:center;gap:10px;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm)}.weak-area-type{flex:1;min-width:0;font-size:13px;font-weight:550;color:var(--text-h)}.trend-chart{width:100%;height:auto;margin-top:4px}.trend-axis{stroke:var(--border);stroke-width:1}.trend-area{fill:var(--accent-bg)}.trend-line{fill:none;stroke:var(--accent);stroke-width:2}.trend-dot{fill:var(--bg);stroke:var(--accent);stroke-width:2}.trend-value-label{font-size:10.5px;font-weight:650;fill:var(--text-h)}.trend-axis-label{font-size:10px;fill:var(--text-muted)}@media(max-width:900px){.stats-top-grid,.stats-mid-grid,.stats-skill-grid{grid-template-columns:1fr}.stats-summary-card{grid-template-columns:repeat(2,1fr)}.stats-profile-grid{grid-template-columns:auto 1fr}}.file-list{margin:0;padding-left:16px;font-family:var(--mono);font-size:12px}.picker-layout{display:grid;grid-template-columns:1fr 1fr;gap:16px}.picker-layout>.card{min-width:0}.hint{font-size:12px}.selected-list,.picker-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:360px;overflow-y:auto}.selected-list li,.picker-list li{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:7px 10px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;transition:border-color .15s ease,background-color .15s ease}.selected-list li:hover,.picker-list li:hover{border-color:var(--accent-border);background:var(--bg-subtle)}.selected-list li span.truncate,.picker-list li span.truncate{max-width:none;min-width:0;flex:1}@media(max-width:900px){.picker-layout{grid-template-columns:1fr}}.option-list{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.option-card{display:flex;align-items:center;gap:4px;padding:4px 6px;border:1.5px solid var(--border-strong);border-radius:var(--radius);background:var(--bg);transition:border-color .15s ease,background-color .15s ease,box-shadow .15s ease}.option-card:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}.option-card.is-correct{border-color:var(--success);background:var(--success-bg)}.option-card.is-correct:focus-within{box-shadow:0 0 0 3px var(--success-bg)}.option-card-multiline{align-items:flex-start}.option-card input[type=text],.option-card textarea{flex:1;border:none;background:transparent;padding:8px 4px}.option-card textarea{resize:vertical}.option-card input[type=text]:hover,.option-card textarea:hover{border-color:transparent}.option-card input[type=text]:focus,.option-card textarea:focus{outline:none;box-shadow:none;border-color:transparent}.option-toggle{display:flex;align-items:center;justify-content:center;width:30px;height:30px;flex-shrink:0;border-radius:50%;border:1.5px solid var(--border-strong);background:var(--bg);color:var(--text-muted);font-size:12px;font-weight:700;cursor:pointer;transition:border-color .15s ease,background-color .15s ease,color .15s ease,transform .08s ease}.option-toggle:hover{border-color:var(--accent-border);color:var(--accent)}.option-toggle:active{transform:scale(.9)}.option-card.is-correct .option-toggle{background:var(--success);border-color:var(--success);color:#fff}.option-index-badge{display:flex;align-items:center;justify-content:center;width:26px;height:26px;flex-shrink:0;margin:2px;border-radius:50%;background:var(--bg-subtle);color:var(--text-muted);font-size:11.5px;font-weight:700}.option-index-badge-accent{background:var(--accent-bg);color:var(--accent)}.option-card-actions{display:flex;align-items:center;gap:2px;flex-shrink:0;padding-top:3px}.option-icon-btn{display:flex;align-items:center;justify-content:center;width:26px;height:26px;flex-shrink:0;border-radius:var(--radius-sm);border:none;background:transparent;color:var(--text-muted);font-size:15px;line-height:1;cursor:pointer;transition:background-color .15s ease,color .15s ease}.option-icon-btn:hover:not(:disabled){background:var(--bg-subtle);color:var(--text-h)}.option-icon-btn:disabled{opacity:.3;cursor:not-allowed}.option-icon-btn-danger:hover:not(:disabled){background:var(--danger-bg);color:var(--danger)}.blank-card-header{display:flex;align-items:center;gap:8px;margin-bottom:10px}.blank-card-title{font-size:11.5px;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.04em}@keyframes fade-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}.page,.login-card{animation:fade-in .22s ease both}@keyframes spin{to{transform:rotate(360deg)}}.spinner{display:inline-block;width:15px;height:15px;border-radius:50%;border:2px solid var(--border);border-top-color:var(--accent);animation:spin .65s linear infinite;flex-shrink:0}.spinner-lg{width:22px;height:22px;border-width:3px}.loading-row{display:flex;align-items:center;gap:10px;padding:24px 0;color:var(--text-muted)}.table tbody tr{transition:background-color .15s ease,opacity .2s ease}.table tbody tr:hover{background:var(--bg-subtle)}.table-wrap.is-refetching{opacity:.45;pointer-events:none}.skeleton-block{display:block;height:12px;border-radius:4px;background:linear-gradient(90deg,var(--border) 25%,var(--bg-subtle) 37%,var(--border) 63%);background-size:400% 100%;animation:skeleton-shimmer 1.4s ease infinite}.skeleton-block.wide{width:85%}.skeleton-block.narrow{width:45%}@keyframes skeleton-shimmer{0%{background-position:100% 50%}to{background-position:0 50%}}.skeleton-card{border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;display:flex;flex-direction:column;gap:8px}.json-status{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:600;margin-top:2px}.json-valid{color:var(--success)}.json-invalid{color:var(--danger)}.field-label-row{display:flex;align-items:baseline;justify-content:space-between;gap:8px}.btn-confirming{background:var(--danger-bg);border-color:var(--danger);color:var(--danger);animation:confirm-pulse 1s ease infinite}@keyframes confirm-pulse{0%,to{box-shadow:0 0 0 0 var(--danger-bg)}50%{box-shadow:0 0 0 4px var(--danger-bg)}}.toast-viewport{position:fixed;bottom:20px;right:20px;z-index:1000;display:flex;flex-direction:column;gap:8px;max-width:340px}.toast{display:flex;align-items:flex-start;gap:8px;padding:11px 15px;border-radius:var(--radius);background:var(--bg);border:1px solid var(--border);box-shadow:var(--shadow);font-size:13px;color:var(--text-h);cursor:pointer;animation:toast-in .2s ease both}@keyframes toast-in{0%{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}.toast-icon{flex-shrink:0;font-weight:700}.toast-success{border-color:var(--success)}.toast-success .toast-icon{color:var(--success)}.toast-error{border-color:var(--danger)}.toast-error .toast-icon{color:var(--danger)}.toast-info .toast-icon{color:var(--accent)}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin-bottom:20px}.stat-card{display:flex;flex-direction:column;gap:10px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:18px 20px;box-shadow:var(--shadow-sm);transition:box-shadow .15s ease,transform .15s ease}.stat-card:hover{box-shadow:var(--shadow);transform:translateY(-1px)}.stat-card-top{display:flex;align-items:center;gap:10px}.stat-card-label{font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.stat-card-value{font-size:28px;font-weight:700;color:var(--text-h);letter-spacing:-.02em}.stat-card-caption{margin:0;font-size:12px;color:var(--text-muted)}.stat-card-icon{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;flex-shrink:0;font-size:14px;font-weight:700}.stat-card-icon-accent{background:var(--accent-bg);color:var(--accent)}.stat-card-icon-success{background:var(--success-bg);color:var(--success)}.stat-card-icon-warning{background:var(--warning-bg);color:var(--warning)}.stat-card-icon-danger{background:var(--danger-bg);color:var(--danger)}.dashboard-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:16px;align-items:start}@media(max-width:900px){.dashboard-grid{grid-template-columns:1fr}}.bar-list{display:flex;flex-direction:column;gap:12px;margin-top:6px}.skill-overview-card{display:flex;flex-direction:column}.skill-overview-card .bar-list-fill{flex:1;justify-content:space-evenly;margin-top:0}.bar-row{display:flex;align-items:center;gap:10px;font-size:13px}.bar-row-icon{display:flex;align-items:center;justify-content:center;width:26px;height:26px;flex-shrink:0;border-radius:999px;background:var(--accent-bg);color:var(--accent)}.bar-row-icon svg{width:13px;height:13px}.bar-row-label{width:74px;flex-shrink:0;color:var(--text-muted);text-transform:capitalize;font-weight:500}.bar-track{flex:1;height:8px;border-radius:999px;background:var(--bg-subtle);overflow:hidden}.bar-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .4s ease}.bar-row-stats{display:flex;flex-direction:column;align-items:flex-end;width:44px;flex-shrink:0}.bar-row-value{font-weight:650;color:var(--text-h);font-variant-numeric:tabular-nums}.bar-row-pct{font-size:11px;color:var(--text-muted);font-variant-numeric:tabular-nums}.quick-link-list{list-style:none;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:3px}.quick-link-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 10px;border-radius:var(--radius-sm);color:var(--text-h);text-decoration:none;font-size:13.5px;font-weight:500;transition:background-color .15s ease}.quick-link-list a:hover{background:var(--bg-subtle)}.quick-link-main{display:flex;align-items:center;gap:10px;min-width:0}.quick-link-icon{display:flex;align-items:center;justify-content:center;width:26px;height:26px;flex-shrink:0;border-radius:8px;background:var(--accent-bg);color:var(--accent)}.quick-link-icon svg{width:13px;height:13px}.quick-link-chevron{flex-shrink:0;color:var(--text-muted);font-size:18px;line-height:1}.dashboard-banner{display:flex;align-items:center;gap:18px;margin-top:16px;padding:22px 26px;border-radius:var(--radius-lg);background:var(--accent-bg);border:1px solid var(--accent-border)}.dashboard-banner-icon{display:flex;align-items:center;justify-content:center;width:46px;height:46px;flex-shrink:0;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;box-shadow:var(--accent-glow)}.dashboard-banner-icon svg{width:22px;height:22px}.dashboard-banner-text{flex:1;min-width:0}.dashboard-banner-text h2{margin:0 0 3px;font-size:15px}.dashboard-banner-text p{margin:0;font-size:13px}.dashboard-banner-cta{flex-shrink:0;background:var(--bg)}.word-chip-text{line-height:2.1}.word-chip{display:inline-block;margin:1px;padding:2px 6px;border:none;border-radius:6px;background:transparent;color:var(--text-h);font:inherit;cursor:pointer;transition:background-color .15s ease,color .15s ease}.word-chip:hover{background:var(--bg-subtle)}.word-chip.is-marked{background:var(--danger-bg);color:var(--danger);text-decoration:line-through}